Back-pressure reducer.



' J. B. RICKETTS.

BACK PRESSURE REDUGER. APPLIOATION rum DEo.ao,19oa.

Patented' Apr. 20, 1909.

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JOHN BOYD RIOKETTS, OF BALTIMORE, MARYLAND.

B ACK-PRE SSURE REDUCER.

Specication of Letters Patent.

Patented April 20, 1909.

Application led December 30, 1908. Serial No. 476,685.

To all 'whom it may concern:

Be it known that I, JOHN BOYD Ricxnrrs, a citizen ofthe United States, and a resident of Baltimore city, in the county of Baltimore City and State of Maryland, have invented a new and Improved Back-Pressure Reducer, of which the 'following is a full, clear, and exact description.

The invention relates to blowers, pumps, stand pipes and like devices through which pass liquid or gaseous iiuids, and its object is to provide a new and improved back pressure reducer for balancing the back pressure and thereby insuring easy running of the blower or pump and reduction of the wear of the blower and pump valves to a minimum, the reducer being for this purpose arranged with a revoluble air cell or iloat having tubular reaction arms through which passes the pumped fluid, to rotate the said chamber by the reaction of the luid llowing out of the reaction arms.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters oi reference indicate corresponding parts in all the views.

Figure l is a side elevation of the improvement as applied to a stand pipe, parts being shown in section; Fig. 2 isa sectional plan view of the same on the line 2-2 oi Fig. l; Fig. 3 is a similar view oi the same on the line 38 of Fig. l; and Fig. i is a sectional side elevation of the improvement modified for use on the delivery pipe 0i a hydraulic ram.

The stand pipe A shown in Fig.` l is provided with an enlargement or a casing B on which is mounted to turn on a ball bearing C a receiver D having an inlet E extending into the inlet of the casing B and the stand pipe A, to allow the water or other fluid flowing up the stand pipe A to enter the receiver D. On the top of the receiver D is bolted or otherwise secured an air cell or float F, and 'from the sides of the receiver D extend tubular reaction arms or pipes G, the fluid on iiowing out of the arms G causing the receiver D and its float F to rotate in the direction of the arrow a by the reacting force of the iiuid on leaving the tubular arms G.

By providing the receiver D with an air cell or float F, the lifting action or' the latter tends to relieve the ball bearing O ci' weight and thus allow free and easy running of the receiver D in the casing B. In order to prevent the receiver D from being liited oi entirely from the ball bearing O the top of the said float F is engaged at the middle by a ball I-I held in a bracket I attached to the stand pipe section A leading from the to of the casing B, so that the receiver D an its float are held against upward axial movement.

Ii desired, a second reducer similarto the one above described, may be attached to the stand pipe at thefupper end ci the section A, as shown in Fig. l, and this reducer consists of a spherical casing B in which rotates on a ball bearing C a receiver D having an inlet E and a spherical float or air cell F and tubular reaction arms G discharging into the casing B and causing the receiver D to rotate within the casing B. Upward axial movement of the receiver D and the float F is prevented by a ball H engaging the top of the iioat F and held in a bracket I secured to the stand pipe section A2 leading from the top of the casing B.

In some cases it is desirable that the inlet E2 for the receiver D2 be provided internally with a spiral lange E3 (see Fig. 4), which acts as a iilt or ump on the iiuid passing up through the in et E2 into the receiver D2. Otherwise, the receiver D2 is the same as above described, and is provided with the reaction arms G2 and an air cell or iioat F2.

Check valves are preferably placed in the upper delivery pipe or in the stand pipe, and a check valve is also placed in the stand pipe above the reducei` to prevent downward leakage.

Although I have shown the reducer as applied to a stand pipe, it is evident the same may be used in p ace oi' the lifting valves in the discharge of the pump, and one or more such reducers may be used, one above the other, as indicated in Fig. l and above described. It can also be used for pumping liquids, air or gases, against pressure, in mines, relrigerating plants, gas works, city water supplies, gas wells, sailing and steam vessels, etc. and to increase the pressure in tanks.

I-Iaving thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A back pressure reducer, comprising a casing having an outlet, a revoluble iiuid receiver mounted to revolve in the said casing and having an inlet for the pumped iiuid, and reaction arms extending from the said receiver for the outflow of the fluid into the said casing and for rotating the receiver.

2. A back pressure reducer, comprising a casing having an inlet and an outlet, a revoluble fluid receiver within the said casing and having an inlet extending into the said casing inlet, and tubular reaction arms extending from the sides of the said revolulole fluid receiver and discharging into the said casing.

3. A back pressure reducer, comprising a casing having an inlet and an outlet, a revoluble fluid receiver within the said casing and having an inlet extending into the said casing inlet, a float on the said receiver, tubular reaction arms extending from the sides of the said revoluble fluid receiver and discharging into the said casing, and means for holding the said receiver and its float against upward axial movement.

4. A back pressure reducer, comprising a casing, connected with the deliver?,T of' a pump, a fluid receiver mounted to turn within the said casing and having an inlet for receiving the pumped fluid, the said receiver' being provided with an air cell and with tubular reaction arms opening into the said casing.

5. A back pressure reducer, comprising a I casing, connected with the delivery of' a pump, a fluid receivermounted to turn within the said casing and hai/ing an inlet for receiving the pumped fluid, the said receiver being provided with an air cell and with tue bular reaction arms opening into the said casing, and a fixed arm carrying a ball engaging the said air cell to hold the same and the fluid receiver against axial upward move- 5 ment.

6. In combination, a stand pipe, and a plurality of baclr pressure reducers, each u provided with an air cell and arranged in the said stand pipe one above the other, each =bacl pressure reducer having a revoluble chamber into which passes the pumped fiuid, and tubular reaction arms for discharging the fluid from the chamber and causing the latter to turn.

8. A back pressure reducer comprising a casing having an outlet, a revoluble fluid receiver within the said casing and having an inlet connected with a fluid supply, a spiral fiange in the said inlet, and reaction arms extending from the said receiver for the outflow of the fluid into the said casing and for rotating the receiver.

9. A back pressure reducer comprising a casing having an outlet, a revoluble fluid receiver within the said casing and having an inlet connected with a fiuid supply, a spiral flange in the said inlet, reaction arms extending f'rom the said receiver for the Outflow of the fluid into the said casing and for rotating the receiver, l nd an air cell for the said receiver.

in testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN BOYD RICKETTS.

lllitnesses 1 'WM R. ARMSTRONG, FRED TW. New. 

